GAMMA-RAYS AND NEUTRINOS FROM DARK-MATTER

High energy astrophysical gamma-rays and neutrinos can be produced bot h by the annihilation and possible slow decay of dark matter particles . We discuss the fluxes and spectra of such secondaries produced by da rk matter particles in the universe and their observability in competi tion with Other astrophysical gamma-ray signals and with atmospheric n eutrinos. To do this, we work within the assumption that the dark matt er particles are neutralinos with are the lightest supersymmetric part icles (LSPs) predicted by supersymmetry theories.